Deep-well pump



Nov. 6, 1928.

H. n BELQIT DEEP WELL PUMP Filed Dec 14, 1925 4 1f T2 w Hllll OMI Patented Nov. `6, 1928.

UNITED STATI-:sv PATENroFFrCE.

HARRY BIELOI'I,` 0F SAN PEDRO,'CALIFORNIA, ASSIGNOR TO ECONOMY PUMP D OIL TOOL COMPANY, OF LOS ANGELES, CALIFORNIA, .A CORPORATION OF CALIFORNIA..

DEEP-WELL PUMP.

Application led December 14, 1925. Serial No. 75,379. y

This invention relates to and has for .a

main object the provision of an improved type of deep well pump, particularly adapted for use in oil wells, and it is also an object to 6 provide a pump for the purpose stated which will afford a greater piston displacement than in other obtaining types of pumps, and also a greater volume of oil admitted to the pump barrel below the piston.`

A further ob3ect H1s to provide in a deep Y, Well pumpmeans for lubricating the piston i in its travel over the pump cylindenand to so arrange the elements of the pump that the entrance of sand into the pump during the continued operation thereof will not a'ect the operation or impair any ofthe working parts.

A still further object is to provide a barrel,

closed at both ends and insertible inte a Well casing, a stationary cylinder stationarily held in and attached to one head of the barrel and of .smaller diameter than' the barrel, and :1g/Same being depended into the barrel., as piston encompassing the cylinder and en-y ShOWn 1n Fig. 1.

closed by the barrel, and arranged for connection with sucker rod` by means of which the piston is reciprocated in the barrel.

Another object is to provide a composite Other objects include providing suitable valves in the barrel and in the piston head for regulating and controlling theadmission of liquid to the ,charge therefrom.

pump cylinder and its dis- In connection with this application referf enceis had to a Patent, Number 1,396,243 granted to me on the 8th dayof November,

1921, for 'deep well pumps.

In the accompanying drawing I have shown a preferred embodiment of my invention, subject to modification Within the scope of the appended claims, Without departing from the spirit of my invention.

In said drawings: Y Fig. 1 is a sectional 'elevation of my improved pump, as a unit, and apart from a Well in which it is adapted to be used.

Figs. 2, 3, 4 and 5 are, respectively, horizontal cross Asections of the same on lines, 2 2, 3 3, 4 4, and 5 5 of Fig. 1.

I have shown my improved pump in the forni of a unit removed from the usual well casing (not shown) and assembled in readiness for insertion bodily into the well.

In the pump proper, as shown, B repre.- sents a substantially elongated barrel of smaller diameter than the smallest section of the well casing, and it is provided at its upper end with a head H having aflange 1 abutting the end of the barrel, an externally threaded extension 2 over which the upper end of the barrel is threaded, and af tapered andI thread 'ed extension 3 to which a section of pump casing (not shown) is' adapted to be threaded. p Said head H has a central internally threaded recess r4 into which the upper end of an elongated cylinder C is threaded an'd held in stationary position within the barrel B, the

The bottom of barrel B has a head H1, similar to head H, threaded into and for clsing the lower end of the barrel. Said head H1 is internally threaded at 5 for receiving the upper end-of a gas anchor (not shown) and the central passage 6 admits the liquid from the well into the barrel B. Head H1 is also eX- ternally threaded at 7 for attachment to a pipe (not shown) depending further into the well, asin other types of'pumps.

BarrelB is provided at the head H1 with a root valve V held in a cage A of usual form and 'said cage is provided witha base 8 which is flanged at 9 and rests upon the inner end of the head H1. Cage A has a threaded extension l() screwed into the head H1 and havinga central passage 1l. The upper end of said passage forms a seat 12 for valve'V, and said passage is normally closed by the ball valve V. Said cage is upwardly eX- tended, however, so as to permit of ample movement of the valve V to effect the complete opening of the valve port l1.

' The piston P is of composite, or sectional form, and is slida-bly disposed in the barrel and between the inner periphery of the same and the louter periphery of the cylinder C, but the piston substantially clears the Wall 105 of the barrel. Said piston has a heady L at its lower end, a ring 1^ at its upper end and an intermediate ring 1" therebetween, said rings being connected by means of tubular sections t, and t. Section t is threaded at one end on 110 en j end on an extension 16 of head h.

Rings 7" and 1" are bored and ground to fit nicely the periphery of cylinder C and the uppermost section t of the piston is substantially larger in diameter thanthe cylinder C so as to provide an annular space 17 around the cylinder and between the rings 1' and 'r for the reception of a quantity of grease, which will serve to thoroughly lubricate the piston during the continued operation of the pump, and at the same time prevent the entrance of sand and grit between the cylinder and piston rings. This structure also serves to prevent leakage of the liquidaround the cylinder. The space 17 may be filled with grease prior to the positioning of the pump in the well by removing a filling plug 18 which is threaded into the 'wall of the section t. f

Piston P is provided with an inlet valve V1, similar to the foot valve V, the ca e D of,

said valve being secured to the pisto'n ead h, and the pump sucker rod R being secured to the head 19 of the cage D, as shown.

In operation, the piston P, including. rings 1' and r', pipe sections t and t', head h and valve V1 with its cage D are assembled as a unit, and grease is packed in the uppermost section between rings r and r. The barrel B Nis then partially assembled with the bottom head I-I1 and valve V and cage A secured thereto as described; cylinder C is secured to head H and piston P positioned on the cylinder C; whereupon the cylinder and piston are positioned in the barrel and the head H secured to the upper end of barrel B. The entire unit may then be bodily lowered into the well to the pro er depth with the barrel almost if not entire y submerged in the liquid ofthe Well. t The usual sucker rod R being attached to the piston P by means of the valve cage D, when the power is applied to the pum the piston P will slide upwardly and .wardly in alternate directions, over rather than in the cylinder C and in the barrel B but not in contact therewith. At each upward stroke of the piston, valve V will open and admit fluid from the well into chamber 20 of the barrel B and above headv h, due to the suction createdrtherein, and as the piston is moved to the end of its upward stroke'the chamber 20 is completely chargedwith the liquid. At the beginning of the ensuing downstroke, valve/V will close by gravity and-pressure created in chamber 20, thusl causing the raising of valve V1 for admitting the contents of chamber 2O into chamber V21 of the piston below the end of cylinder C. The continuing up-stroke of the piston will lift the contents of the' piston and cylinder and shown a preferred form' of my for the full length of the stroke and discharge a correspondin quantity of the liquid from the pump at te top ofthe well, or other point of discharge. The upwardmovement of piston P eiects the closing of the valve V1. At each ycomplete cycle of operation, the operation just described is repeated.

It will be apparent to those skilled in the -art relating to deep well pumps that the capacity of a pump is always limited by the size of the well casing and the pump cylinder, and especially so when the piston operates in rather than over the cylinder, thus necessitating a piston of smaller diameter than that of the cylinder in which it operates` rThe piston displacement is correspondingly decreased and limited without increasing the stroke to an im racticable extent.

By the use oi) my improved pump, however, it will be noted that the diameter of the piston very nearly approaches that `of the barrel and is substantially greater than that of the cylinder through which the liquid is discharged. Thus a shorter stroke may be provided for the sucker rod and a substantially greater piston displacement is had. This insures economy in operation, greater pump capacity and otherwise more advantageous conditions than would prevail in other types of pumps under similar operatcurred, due to the entrance of sand and grit' from the well into the pump joints and on the wearing surfaces, which serves to clo the pump at times and score the oints an piston and cylinder surfaces so t at repair and often replacements are necessary at frequent intervals. Furthermore it is generally impossible'` to suiciently lubricate the wearing parts for long continued usage.

In my improved pump, as herein described and shown, due to the provision of an external rather than an internal piston, I have provided means for thoroughly lubricating thepistonr and cylinder, and this serves to not only lubricate the arts well but to prevent undue amounts oi) sand-and grit from gaining access to the wearin parts and also to prevent leakage around t e cylinder and a consequent loss of eiiciency.

The valves V and V1 should be as large as practicable so as to obtain a maximum discharge volume of the li uid and to further -reduce the resistance to t e downward movement of the piston.

It will be understood that I have described ump and that said disclosure is subject to change for adapting thev pump to varying conditions. What I claim is 1. A deep well pump including a barrel having an inlet valve therein and a head communicatin closing the end thereof opposite said valve, a cylinder stationarily held in and of substantially smaller diameter than said barrel, and a sectional piston having a valve in one end thereof and reciprocably mounted internally of said barrel and externally of said cylinder, certain sections of said piston being spaced apart for providing a lubricant recess around said cylinder.

2. A deep well pump including a barrel having an inlet valve therein and a head closing the end thereof opposite said valve, a cylinder stationarily held in and of substantially smaller diameter than said barrel, and a piston having a valve in one end thereof and reciprocably mounted internally of said barrel and externally of said cylinder, said piston having rings engaging said cylinder and sections connecting said rlngs, providing an annular chamber around said cylinder for holding a lubricant.

3. A deep well pump including a barrel having an inlet valve therein and a head closing the end thereof opposite said valve, a c linder stationarily held in and of substantially smaller diameter than said barrel, and a piston having a valve in one end thereof and reciprocably mounted internally of said bar-A rel and externally of said cylinder, said piston having rings engaging said cylinder and sections connecting said rings, providing an annular chamber around said cylinder for holding a lubricant, an inlet chamber being' provided in said barrel below said piston and with the well and with said cylinder, for t e purpose described.

Ll. A deep Well pump including a barrel having an inlet valve therein and a head closing the end thereof opposite said valve, a

having rings .engaging said cylinder and sections connecting said rings, providing an annular chamber around said cylinder for holding a lub-ricant, an inlet chamber being provided in said barrel below said piston and communicating With the Well and with said cylinder, the valve in said barrel closing said chamber against communication with the well, and the valve in said piston closing said chamber against communication with said cylinder, at alternate movements of the pis ton.

5. A deep Well pump including a barrel having closures at the ends thereof, a foot valve in the lower end thereof and a chamber for receiving a charge of liquid from the well, a cylinder closing a portion of the'barrel at its other end and providing means for discharging liquid therefrom, a hollow piston I slidable externally over said cylinder and of smaller diameter than said barrel, and a valve in said piston for admitting liquid to the piston and cylinder' on the down-stroke of the piston for discharge on the up-stroke thereof, said piston composed of alternating sections and rings, providing recesses between the rings for holding a lubricant.,

. HARRY BELOIT. 

